2265561 has 12 divisors (see below), whose sum is σ = 3297840. Its totient is φ = 1498680.

The previous prime is 2265551. The next prime is 2265581. The reversal of 2265561 is 1655622.

2265561 is a `hidden beast` number, since 2 + 2 + 655 + 6 + 1 = 666.

It is not a de Polignac number, because 2265561 - 2⁷ = 2265433 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2265521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 346 + ... + 2156.

It is an arithmetic number, because the mean of its divisors is an integer number (274820).

2^2265561 is an apocalyptic number.

It is an amenable number.

2265561 is a deficient number, since it is larger than the sum of its proper divisors (1032279).

2265561 is a wasteful number, since it uses less digits than its factorization.

2265561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1956 (or 1953 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 2265561 is about 1505.1780625561. The cubic root of 2265561 is about 131.3384600940.

The spelling of 2265561 in words is "two million, two hundred sixty-five thousand, five hundred sixty-one".